Controlling electric lamps.



No. 697,l6l. Patented Apr. 8 1902.

E. DXLEY CONTROLLING- ELEGTRlG LAMPS (Application filed Aug. 25, 1900.)

(N0 Modei.)

5% m M n Witnesses Avg.

Tux; ,vonms PETERS co. WAS

UNITED STATEs PATENT OFFICE."

ELECTRIC COMPANY,

A CORPORATION OF NEW YORK.

CONTROLLlNG ELECTRlC LAMPS.

SPEGIFIGATION forming part of Letters Patent No.

697,161, dated April 8, 1902.

Application filed August 25, 1900, Serial No. 528,00?r (No 1410801.

To (MA whom may concern.-

Be itknown that l, EUSTACE OXLEY, a subject of the Queen of. Great Britain, residing at Brooklyn, county of Kings, State of New ork, have invented certain new and useful 'ovenients in Controlling Electric Lamps,

No. 1,820,) ciiicntion. In operating constant-current series arelamps it sometimes desirable to selectively control all or certain of the lamps in circuit, so as to permit their operation onlyet stated periods not e some as the periods which the rest the loan ps are burning, For example, in inunicigiallighting' lumps located at some points a be. cut off earlier than others, thus permitting n reduction in the cost of lighting without materially effecting the conuenien cc the public. Systems have been propos r eiiecting e result of this I kin-Cl, some on iich involve tug. employment of on eclliition control-cirouit by which the lsinps nny beselectivel operated and others of which; employs clock mechanism for operthe cutout s itch of the lamp at the 'cper time. of these systems are open to objection, not any on account of their e3:- pense, but also of ti eir liability to set out of 1 have simplified and 'cheapenecl the oral r. l

which the lighting-circuit itself may be user to convey ininulses for determining the operation of the cutout devices controlling the ere-lam s. Mysystein is based upon the ability to shortc ircnit a constant-current cirsuit supplied? Brush, ilhomsozrliouston, or other open-coil type of generator. Such a generator, although supplying one hundred Verity-five or moreere-lumps, may be -ixcuitei Without inj n y to the machine t or excessive sparking at opening or closing the l ploy. the point Where uesireil to selectively switch and electrics-l r operating the switch, nl quickly upon the 0368521- -e circuit. Vith such an "on by suort circuiting the terini- 5o unis of the generator tne ilistrlbuting-stnt on or at other control point JllG SWliTOil of which the following is it during control ofgsuch systems byprovirling means current translating devices, or is applicableeven to coi'isiant-current systems containing translating devices of any clisrztcter.

The distinctive feature of my system involves a. selective control of certain translating lei "ices bycurrent flowing in the circuit, whether it be of the some or clifferentcharecter from that operating the translating clevices, and means for varying the current to cut in or out the trunslutinn'ilevices. vention embodies this feature of novelty well as other features which will be specifically pointedouthereinefterancl definitely in- -Clicaled in the claims appended to this specification.

In the accompanying drawing, which tile grainmetically'shows a system embodying my improvements, 1 represents a, constant-current generator, and 2 2 2 2 a series of arcleinps supplied by a circuit feci by the said generator and, connected,- us usual in such circuits, in series relation. in this circuit I interpose a switch for each lamp or other translating device, such (is 2 which is to be selectively controlled, the operation of which may be timed by the controlswitch 3 at the central or other control station. This switch may be operated by any suitable electrical device responsive to change of current. As sh Wu, I employ an electrouisgnet i, wound with su'ificiently course Wire to curry the circuit-current without heating and connected in such relation to the circuit esto be respon- Theirs-- sire to changes of currenttherein. As shown,

it is placed in series relation. its armature inounteti on n spring-retracted lover 5, provic'led with pawl engaging erutchetwrheel G, mounted on the arbor of a gear-Wheel engaging; {t pinion on on insulating-disk 7, provizlefl with two are shaped contec is 8 Mounted on the periphery of the disk in operative relation to these contests are four coordinate contacts 9 1011 12 at such disienees 

